T wisted-pair cabling (UTP and ScTP) :: | 19/55
| Minimum horizontal cable bend radius The minimum bend radius for horizontal cables will vary depending on the condition of the cable during installation (tensile load) and after installation when the cable is at rest (no-load). Requirements The minimum bend radius, under no-load conditions, for 4-pair UTP cable shall not be less than four times the cable diameter and the minimum bend radius of 4-pair ScTP cable, under no-load conditions, shall be eight times the cable diameter. Minimum backbone cable bend radius Requirements The minimum bend radius, under no-load conditions, for multipair backbone cable shall be ten times the cable diameter. Minimum patch cable bend radius Requirements The minimum bend radius, under no load conditions, for 4-pair ScTP patch cable shall be eight times the cable diameter. NOTE - Minimum bend radius conditions and cables not specified under subclause 10.2.1 (i.e., Category 6) are under further study. Maximum pulling tension Requirements The maximum pulling tension of 4-pair 24 AWG UTP cable shall be 110 N (25 lbf). For multipair backbone cable, manufacturer's pulling tension guidelines shall be followed.
100-ohm twisted-pair cabling (UTP and ScTP) :: | 19/55